Out of Memory or System Resources – Fix This Outlook Error

Have you ever received an Outlook error message like –
Out of memory or system resources? It is really very annoying when you receive
an error message from the application that you use daily. In this article, we
will discuss one of the most common Outlook error messages that may occur due
to various reasons. I will also share the useful tips to fix the Outlook error
– Out of memory or system resources.

Outlook Error
– Out of Memory or System Resources

The Microsoft Outlook out of memory or system
resources error can occur in any version of Microsoft Outlook when you try to
open the Outlook application.

The above Outlook error most possibly occurs if there
are too many PST files connected to your Outlook profile and the files are
fairly large. In case you do not know, Microsoft Outlook has a limited amount
of space for each of the email accounts you have configured with it. This means
whenever you open an Outlook data file, Microsoft Outlook uses a certain part
of memory as a cache in order to improve its performance. And when space
reaches its limit and there is no free space left for Outlook to use, the “Outlook out of memory or system resources” error pops up. In some cases, corruption in PST files can also cause this
Outlook error.

How to Fix
“Outlook Out of Memory or System Resources” Error?

Now let us discuss the ways to fix this Outlook error.
There are multiple solutions using which you can fix this Outlook error. I have
given the best possible solutions below, you should try them one by one.

Solution #1 – Reduce the Number of PST Files

Since the primary reason for this Outlook error is a
large number of PST files connected to your Outlook profile, you can simply
resolve this error by reducing the number of PST files. Disconnect the PST
files that are not being actively used by Microsoft Outlook at a point in time.
There are two ways to do that:

Way #1: First, open Microsoft
Outlook. Then right-click the PST file that you want to close, and select Close in the popup context menu. This
will close the PST file. In the same way, you can close other PST files one by
one.

Way #2: First, open Microsoft
Outlook. Click the File tab on the
taskbar >Account Settings. On the Account Settings dialog box, click
the Data Files tab. Now click the
PST file once and then click the Remove button to remove it. In the same way, you can remove other PST files one by
one.

Note: If you do not want to remove
the PST files from Outlook but want to fix the Outlook error, you should try
the next solution.

Solution #2 – Reduce the Memory Cache Size

Instead of removing the PST files from your Outlook
profile, you can reduce the memory cache size assigned by Outlook to each PST
file using the Registry. You need to follow the steps given below:

Step 1: First, make sure Microsoft
Outlook is closed. Go to the Start menu by clicking the Win key.

Step 2: Then type “regedit” in the search box, and hit the Enter button. This will open the Registry Editor window.

Step 3: In the registry editor, you
need to browse to the key given below:

Step 5: You need to name this new
value that you are creating – UseLegacyCacheSize.
Then double-click it and define its value data as 1.

Step 6: Now close Registry Editor
and restart Microsoft Outlook on your computer.

Note: Keep in mind that using the
above solution will decrease the Outlook’s performance because now only a few
read/write operations will be cached.

By reducing the number of PST files and/or by reducing
the memory cache size, you can successfully fix the Outlook out of memory or
system resources error. Now you can open Outlook without any error message. But
if still the same Outlook error occurs, this means the PST file you are trying
to add is corrupted and you need to repair it. To learn how to repair PST file,
please refer to solution #3.

Solution #3 – Repair PST File

There are two ways to repair PST file – either you can
use the Inbox Repair tool aka scanpst utility, or you can use a professional
PST Repair tool. Before you can use any paid solution, you should try the Inbox
Repair tool provided by Microsoft itself. Comes as a built-in tool in Outlook,
the scanpst utility can scan corrupt PST file and repair it. You can find the
scanpst utility exe under the installation directory of your Outlook
application. Double-click it and then follow the steps given below to repair
PST file using the scanpst utility:

Step 1: On the Microsoft Outlook Inbox Repair Tool window, click the Browse button and select the corrupt
PST file that you want to repair.

Step 2: Once you select the PST
file, it will be shown in the edit box. Now click the Start button to start the scanning process.

Step 3: The scanning process is
being conducted on your computer. It may take some time so do not cancel the
process.

Step 4: Once the scanning process is
successfully completed, you will see the report in which the total number of
errors/issues are given.

Step 5: Now you can start the
repairing process by clicking the Repair button. Note: There is an option to
take the backup of your PST file.

Within a few minutes, the PST file will be repaired.

You can then try to add this repaired PST file in your
Outlook profile. In case you are still receiving the same Outlook error, you
should consider using a professional PST Repair tool to repair PST file.

Professional
PST Repair Tool

Although the Inbox Repair tool is quite effective, it may fail sometimes if the PST files are severely corrupted. In such a situation, you should use a professional PST Repair tool. Download the Outlook PST Repair tool provided by SysInfo. This software is highly capable of fixing severely corrupted PST files and restoring maximum mailbox data from them. Just have a look at the key features of this PST Repair tool –

It allows you to recover the complete mailbox data that
include emails, attachments, contacts, calendar, etc. from the corrupt PST
file.

This tool can repair PST file of any size. There is no such
size limitation. A PST file up to 80 GB has been successfully tested.

During scanning and recovery processes, it maintains the
original folder hierarchy of the Outlook PST files.

If the PST files are encrypted and/or password protected,
even then you can use this software to repair PST file.

Using this software, you can save the recovered mailbox data
into a new file of PST and other email file formats that include MSG, MBOX,
DBX, and EML.

It supports PST files created by all versions of Microsoft
Outlook including the latest 2019.

This software smoothly runs in all Windows-based operating
systems including the latest Win 10.

It is available with the demo version for free evaluation.
Demo version will show you the preview of your PST file mailbox data.

Please check the working of software:

Conclusion

The article has explained Outlook out of memory or
system resources error in detail. There are multiple solutions given here in
this article that will you fix the Outlook error. You should try the given
solutions one by one. In case the manual solutions do not work, you should use
a professional solution. I have suggested a PST Repair tool, highly recommended
by many Outlook users and professionals.